I wrote a tutorial on how to use plotly, an R package that allows users to include interactive charts in R Markdown projects.
Here is an example of the bar chart that was created using plotly in an R Markdown project:
The tutorial is available on RPubs, and the R Markdown code is available on my GitHub page.
I really like using plotly for my R Markdown projects because it has some nice interactive features. Hopefully, this tutorial will open the doors to more creativity with R Markdown projects.